JPS6223974Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a backset adjustment device for latch structures of the type commonly used in doors and the like. In particular, the present invention provides for each bolt casing and bolt assembly of the latch structure to be equipped with
The present invention relates to a preferred bayonet backset adjustment device that is much more convenient and easier to operate than the prior art. Thus, with a minimum of pre-planned handling operations, the latch structure can be adapted to different backset dimensions by increasing or decreasing the backset distance of the bolt casing and adapting the movable bolt to such backset changes. .

For latch structures of the type for use with doors and the like, the backset dimensions are:
The horizontal axis from the front end of the bolt casing (this is the axis passing through the center of rotation when the latch operating device is rotated to extend and retract the bolt of the latch structure; in the present invention, this axis is the axis between the first spindle and the second spindle).
Corresponds to a spindle. ) is the distance measured vertically forward. This backset size is often standardized by the industry. Standardized backset dimensions include the latch-mounted front plate (this is effectively the forward end of the stationary frame).
It is calculated from the front exposed surface of. In typical installations, the latch mounting face plate is installed in a recess in the edge or vertical edge of the door;
Since the front surface of the face plate is aligned with the edge or vertical edge of the door, in most cases the backset dimension will be equal to the distance from the edge of the door to the transverse axis of the latch operating device.

Over the past years, the most widely used backset dimensions have been standardized to 2/8 inch (6.35 mm) and 3/8 inch (9.525 mm), so before installing the latch structure You can know how much should be. However, relatively recently, many latch structures have been manufactured with increased backset dimensions. The reason for this is to provide greater bolt travel (ie, the longitudinal distance that the bolt is moved between retracted and extended positions) for greater accuracy.

Therefore, the current industry has adopted a second, larger standard backset size, which includes 2/4 inch (12.7 mm) and 3/4 inch (19.05 mm). It is 3/8 inch (9.525 mm) larger than the conventional first standard backset dimension. Most manufacturers of latch structures meet this dual backset size requirement by manufacturing and selling two different and separate models of their many latch structures. Some models satisfy the backset requirements of older standards.
It has backset dimensions of 2/8" (6.35mm) and 3/8" (9.525mm), while other models have the new standard dimensions of 2/4" (12.7mm) and 3/4" (19.05mm). Although it has backset dimensions, it is relatively expensive due to the need to manufacture a large number of separate models.

Therefore, between the two standard backset dimensions: 2/8" (6.35mm) and 3/8" (9.525mm) and 2/4" (12.7mm) and 3/4" (19.05mm). There is a need and need in the industry for a single model latch structure that can be selectively adjusted relatively quickly and easily between the two. Furthermore, such adjustability must be such that adjustment operations can be carried out relatively easily. Installation of the latch structure is often carried out by professional personnel familiar with the art of latch structures, to whom the simplicity of adjustment may not be of great importance. However, the installation of latches is also performed by many, if not most, ordinary homeowners, who are not trained in the art of latches and therefore cannot simplify the adjustment. This is the most important matter.

It is, therefore, an object of the present invention to have at least two easily adjustable backset size setting points so that adjustment of the backset size settings can be easily performed by an inexperienced person without sufficient technical understanding of latch structures. It is an object of the present invention to provide a latch structure of the type for use in doors and the like.

According to the present invention, adjustments to backset dimensions can be made quickly and easily, minimizing the possibility of erroneous adjustments. Furthermore, providing these two backset size adjustments in a single model latch structure eliminates the need for two completely separate latch structures.

Another object of the present invention is that it has the general properties mentioned above and the feature of adjustable separate backsets, but its unique simplified form allows it to be manufactured and marketed with minimal additional cost. The purpose of the present invention is to provide a latch structure that allows for The preferred embodiment of the latch structure of the present invention provides the latch structure with virtually the same configuration as prior art latch structures having only a single backset dimension, except for the forward bolt casing and bolt assembly configuration. can do. In other words, the entire basic latch structure, including the operating assembly, the basic stationary frame, the latch operating device or devices, and the manual operating knob coupled to the bolt assembly, can be replaced by a conventional latch. It can be constructed in the same way as a structure.

The basic configuration for performing backset adjustment according to the invention primarily includes a front bolt casing and a bolt assembly that can reciprocate longitudinally back and forth within the front bolt casing. Preferably, each is formed from two telescoping parts, each part being operatively connected by a projection and slot generally comprising a bayonet joint. The arrangement of each projection and slot is preferably configured to be vertically adjustable by the same predetermined amount. Thus, the bolt casing can be selectively adjusted longitudinally fore and aft to increase or decrease the backset distance, and the bolt assembly can be similarly adjusted to accommodate.

Yet another object of the present invention is to provide an adjustable backset of the general nature described above, which specifically incorporates an adjustment device configured to minimize the possibility of adjustment errors during the adjustment operation of the backset. The purpose of the present invention is to provide a latch structure. When selectively adjusting each of the bolt casings and bolt assemblies by means of the aforementioned bayonet joints, the movement of each part for backset adjustment involves first a partial lateral rotation from one backset adjustment position. Each of the bolt casings and bolt assemblies are configured to move vertically, then partially rotate laterally again to a new backset adjustment position. By forming some movable parts of each of the bolt casing and bolt assembly, usually preferably having a rectangular cross-sectional shape, the parts of the bolt assembly that engage when parts of the bolt casing are partially rotated laterally. It is absolutely required that the part be partially rotated laterally.

Other objects and advantages of the invention will become apparent from the accompanying drawings and the following description, given by way of example.

The drawings, particularly FIG. 1, show the backset adjustment system of the present invention incorporated into a typical latch structure (the one shown is a typical deadbolt structure). It should first be pointed out that these latch structures (or deadbolt structures) are manufactured using methods and conventional materials well known to those skilled in the art. Further, although the drawings show the backset adjustment device of the present invention incorporated into a specific latch structure, the principles of the present invention are limited to the incorporation into such specific latch structures. Rather, it should be interpreted broadly within the scope of the claims for utility model registration.

FIG. 1 shows a latch structure in the form of a deadbolt structure, which is mounted within a typical door, generally designated by the numeral 10. The door 10 has an outer surface 14 and an inner surface 1 thereof.
6 and has a lateral latch opening 12 formed therethrough. This lateral latch opening 1
2 is a vertical latch opening 18 formed to extend vertically forward to the vertical end face 20 of the doorknob;
intersects with In general, a dead bolt structure is
It has an in/out door latch operating device, generally designated by the numeral 22, with a portion of the latch operating device 22 extending into the latch openings 12, 18 and generally designated by the numeral 24. The bolt assemblies 24 are interconnected to operate the bolt assemblies 24 within the bolt casing, generally indicated at 26, on the door 1.
It is caused to reciprocate between an extended position and a retracted position from the vertical end surface 20 of 0. Latch operating device 2
2 comprises an outer operating assembly, generally designated 28, and an inner operating assembly, generally designated 30, which operating assemblies 28, 30 are mounted within a stationary frame, generally designated 34. It is connected in a known manner to operate a movable latch drive mechanism (indicated generally by the numeral 32).

In particular, the outer operating assembly 28 includes a typical lock cylinder 36 projecting outwardly from the outer surface 14 of the door 10 and having a hard protective collar and ring assembly 38 fitted therein.
and a cover assembly 40. The lock cylinder 36, protective collar and ring assembly 38, and cover assembly 40 are secured laterally by a pair of first securing members 44 against a reinforcing plate 42 that is partially within the lateral latch opening 12. Fixed. The outer operating assembly 28 has a transverse axis or first spindle 46 extending laterally into the transverse latch opening 12, which spindle 46 is rotatably mounted with a lock plug 47 of the lock cylinder 36. It is being

The inner operating assembly 30 has a manual operating knob 48 that is rotatable within a cover assembly 50 that surrounds a reinforcing plate 52 that extends inwardly of the lateral latch opening 12. ing. Secret money 54
is fixed in contact with the outside of the reinforcing plate 52 by the first fixing member 44 . A pair of second fixing members 5
6 engages with the cover assembly 50, and the first fixing member 4
It is fixed to the outer end of 4. Inner operating assembly 30 has a laterally extending transverse axis or second spindle 58 that extends into transverse latch opening 12 for rotation with manual operating knob 48 . is fixed to the knob 48.

The rear portion of the latch drive mechanism 32 within the longitudinal latch opening 18 is defined by a crank hub 60 rotatable within the stationary frame 34, with which the crank hub 60 is integrally connected. A slotted crank arm 62 projects radially from 60. The inner ends of the first and second spindles 46, 58 are telescopically fitted into the crank hub 60 such that they cannot rotate relative to the crank hub 60. The rear ends of the pair of drive levers 64 that reciprocate in the vertical direction are
The drive lever 64 is pivotally connected to the free end of the crank arm 62 by a laterally extending pin 66.
The forward end of the bolt assembly 24 is pivotally connected to the rear extension of the bolt assembly 24 by a laterally extending pin 68.

Thus, the first and second spindles 46,5
When either the first spindle 46 or the second spindle 58 is partially rotated by operating either the lock cylinder 36 or the manual operation knob 48 connected to each of the crank hubs 60 and 8, the crank hub 60 and the crank arm 62 is rotated,
It is reciprocated in the vertical direction with the drive lever 64. This causes the bolt assembly 24 to reciprocate longitudinally between an extended position, as shown in FIG. 1, for example, and a retracted position. Typically, when the bolt assembly 24 is in the retracted position, the bolt assembly 24 is fully retracted into the bolt casing 26 and the bolt assembly 24 is fully retracted into the bolt casing 26.
4 occupies a position flush with the vertical end surface 20 of the door 10. Furthermore, according to the invention, the transverse axis of the latch operating device 22 coincides with the transverse axis of the first or second spindle 46 or 58.

In particular, in accordance with the present invention, as shown in FIGS. 1, 2 and 9, the bolt assembly 24 includes an outer bolt 70 in the form of a cap with an open rear end.
and an inner bolt carriage 72 formed in the shape of a thick shell, the rear end of which is connected to the drive lever 64 of the latch drive mechanism 32 as described above. The bolt carriage 72 is preferably arranged to surround a conventional rigid fixed core as shown in FIG. As shown in FIG. 9, the cross-sectional shape of the outer bolt 70 is
It is formed of a flat vertical side surface and slightly curved upper and lower surfaces, and guide tabs 74 that protrude laterally are formed at positions facing each other on the vertical side surfaces. A protrusion 76 extending inward is vertically formed on the lower surface. The inner bolt carriage 72 has a generally cylindrical profile sized to fit within the outer bolt 70, but is formed with vertically upwardly and downwardly extending locating ridges 78, with each ridge 78 having a vertically extending locating ridge 78. At least two spaced apart, identically shaped backset locating slots are formed, a rear locating slot 80 and a front locating slot 82. Both positioning slots 80, 82 are designed as transverse slots.

Thus, assembly of the inner bolt carriage 72 onto the outer bolt 70 can be accomplished by rotating the inner bolt carriage 72 into a position in which the locating ridges 78 of the inner bolt carriage 72 are not longitudinally aligned with the projections 76 of the outer bolt 70 . It can be a state. With this configuration, the outer bolt 70 and the inner bolt carriage 7
Free vertical movement is possible between 2 and 2. The inner bolt carriage 72 is advanced longitudinally a maximum distance relative to the outer bolt 70 and rotated to engage the protrusion 76 of the outer bolt 70 into the rear locating slot 80 of the inner bolt carriage 72. As shown in FIGS. 1 and 2, the longitudinal extension of bolt assembly 24 is minimized. This position is the minimum backset position of the bolt, as will become clearer later. After partially rotating the inner bolt carriage 72 with respect to the outer bolt 70 and disengaging the protrusion 76 of the outer bolt 70 from the rearward locating slot 80 of the inner bolt carriage 72, the inner bolt carriage 72 is rotated longitudinally rearwardly with respect to the outer bolt 70. Move, protrusion 7
6 can be aligned with the forward positioning slot 82. This causes the bolt assembly 24 to be
It can be positioned in the vertically extended length as shown in the figure. This position is the maximum backset position of the bolt. Furthermore, adjustment of the bolt length, that is, adjustment of the backset position of the bolt, is as follows:
For this adjustment, a selectively operable bayonet joint is provided between the outer bolt 70 and the inner bolt carriage 7.
This can be achieved by placing or coupling between 2 and 2.

The bolt casing 26 is likewise formed by parts that are fitted longitudinally into one another, namely an outer casing part 84 and an inner casing part 86. The rear part of the outer casing part 84 is fixed to the stationary frame 34 of the latch, and the front part of the outer casing part 84 is fitted with an inner casing part 86. The front portion of the inner casing part 86 is partially fitted into the circular front plate assembly 88 to form the front plate assembly 8.
It is fixed at 8. Referring again to FIG. 9, outer casing part 84 is formed with a generally U-shaped longitudinally extending ridge 90. Referring again to FIG. This allows U
The glyph-shaped ridge 90 defines an inwardly opening longitudinal locating slot 92. The longitudinal locating slot 92 transversely intersects the rear backset locating slot 94 and the front backset locating slot 96. The inner casing part 86 has a hollow, generally rectangular cross-sectional shape and is shaped to match the outer bolt 70 of the bolt assembly 24 that is reciprocatable therein, but the outer bolt 70 It is accepted so that it cannot rotate inside. The inner casing part 86 is formed with mutually opposing longitudinal, generally U-shaped ridges 98 which allow the outer bolt 7
0 guide tab 74 is received and guided. Positioning slots 92,9 of outer casing part 84
Inner casing part 86 adjacent to 4 and 96
The U-shaped ridge 98 is formed with an outer projection 100, the outer projection 100 being sized to be received within and movable within the locating slot of the outer casing part 84. It's decided.

Thus, when the outer projection 100 of the inner casing part 86 is longitudinally aligned with the longitudinal positioning slot 92 of the outer casing part 84 for longitudinal movement therein, the outer casing part 84 Insert part 84 into inner casing part 8
It can be fitted on top of 6. As shown in FIGS. 1 and 2, positioning in the fully engaged position is achieved by positioning the outer lugs 100 of the inner casing part 86.
along the longitudinal locating slot 92 to the rear backset locating slot 94 of the outer casing part 84, and then partially rotating both casing parts 84 and 86 relative to each other;
This is accomplished by fully engaging the outer projection 100 laterally into the rear backset locating slot 94. This position is the minimum backset position of the casing. Both casing parts 8
4 and 86 relative to each other, then moving them longitudinally relative to each other, and finally rotating them relative to each other again, the outer protrusion 100 is progressively moved out of the rearward backset positioning slot 94. It can be moved laterally enough into the forward backset positioning slot 96 to place the outer casing part 84 and the inner casing part 86 in the relative positions shown in FIG. This position is the maximum backset position of the casing. Additionally, rear and front backset positioning slots 94 and 96 are joined by a longitudinal positioning slot 92 cooperating with the outer projection 100 of the inner casing part 86.
means a bayonet joint for adjusting the backset position between both casing parts 84 and 86.

For the particular deadbolt structure shown, this backset dimension extends longitudinally forward from the transverse axis of the first spindle 46 and second spindle 58 to the front face of the faceplate assembly 88 or vertical end face 20 of the door. be measured. In industry, the minimum backset dimensions are 2/8" (6.35mm) and 3/8" (9.525mm), and the maximum backset dimensions are 2/4" (12.7mm) and 3/4" (19.05mm).
mm).

Thus, for the illustrated deadbolt structure, which is a preferred embodiment of the latch structure of the present invention,
The minimum backset position of the bolt casing and bolt assembly is shown in FIGS. 1, 2, 3 and 5. The outer casing part 84 is longitudinally fitted a maximum distance into the inner casing part 86 such that the outer projection 100 of the inner casing part 86 is inserted into the rear backset positioning slot 94 of the outer casing part 84. completely included. At the same time, the outer bolt 70 is fitted longitudinally a maximum distance into the inner bolt carriage 72, and the protrusion 76 of the outer bolt
Located in the rear locating slot 80 of the inner bolt carriage 72. Therefore, the dead bolt structure is normally sufficiently operable to extend and retract the bolt assembly 24 within the bolt casing to the minimum backset position of the bolt. Furthermore, as can be seen in FIG.
6 are engaged and positioned such that their legs and outer casing parts 84 engage and frictionally resist, while allowing movement between the bolt casing and the various parts of the bolt assembly. These parts are held together by friction during backset adjustment.

If it is desired to position the deadbolt structure in the maximum backset position, backset adjustments are made prior to installing the deadbolt structure in the door. First, with the outer bolt 70 of the bolt assembly 24 in the extended position, one hand grasps the outer bolt 70 and the other hand grasps the latch stationary frame 34 to provide relative rotational movement between the two. As a result, the outer bolt 70
and the inner casing part 86 are both rotated half a turn. This is because they are rotatably constrained together by their common shape, as shown in FIG. 9 above. Furthermore, due to this rotation,
The outer projection 100 of the inner casing part 86 is
From the position of FIG. 3 to the position of FIG. 4 (i.e., from the position of FIG.
vertical positioning slot 92). Additionally, this causes the outer bolt 70 and its protrusion 76 to move laterally out of the rear locating slot 80 of the inner bolt carriage 72 from the position of FIGS. 3 and 5 to the position of FIGS. 4 and 6. Moved. During this rotational movement, the outer casing part 84 and the inner bolt carriage 72 remain unchanged without relative rotation. This is because the outer casing part 84 is fixed to the stationary frame 34 of the latch and the inner bolt carriage 72 is pivotally fixed to the drive lever 64 of the latch drive mechanism 32.

Next, applying an outward longitudinal force to the outer bolt 70 and inner casing part 86 while holding the inner bolt carriage 72 and outer casing part 84 together by holding the stationary frame 34 of the latch; Both bolt assembly 24 and casing assembly or bolt casing 26 extend longitudinally to the position shown in FIG. Indeed, in the illustrated embodiment, as shown in FIG.
is in longitudinal abutting relationship with the rear surface of the casing 70, so that when the outer bolt 70 is moved forward, the inner casing part 86 is simultaneously automatically moved to the position shown in FIG. Outer protrusion 1 of inner casing part 86
00 has finished moving along the longitudinal positioning slot 92 of the outer casing part 84 and the protrusion 76 of the outer bolt 70 has finished moving along the cylindrical surface of the inner bolt carriage 72. Finally, partial rotation of outer bolt 70 laterally realigns each of bolt assembly 24 and bolt casing 26 to the position of FIG. 8. In the position of FIG. 8, the projection 76 of the outer bolt 70 is laterally engaged into the forward locating slot 82 of the inner bolt carriage 72, and the outer projection 100 of the inner casing part 86 is engaged laterally into the forward backset locating slot 82 of the inner bolt carriage 72. 96. This position is the maximum backset position of the bolt.

Therefore, the improved latch structure provided in accordance with the present invention allows for selective adjustment of the latch structure to accommodate either of at least two buckset adjustments. A bayonet joint within the bolt casing of the latch allows you to quickly and efficiently adjust the latch to change backsets by performing simple handling procedures that do not require specialized knowledge of latch structures. It is possible to do so. According to current industry standards and current latch construction, the minimum backset size settings are 2/8 inch (6.35 mm) and 3/8 inch, as previously mentioned.
inch (9.525mm), and the maximum backset dimension settings are 2/4 inch (12.7 mm) and 3/4 inch (19.05 mm). Therefore, the need for multiple latch structure models as in the prior art is eliminated, and changes to the required backset dimensions can be made.

[Brief explanation of the drawing]

FIG. 1 is a horizontal cross-sectional view of a typical latch structure incorporating the preferred embodiment of the backset adjustment principle of the present invention installed in a door, with the latch structure in the extended bolt position; The minimum backset adjustment position is shown. FIG. 2 is a longitudinal sectional view taken along the line 2--2 in FIG. 1, with parts cut away to more clearly show internal parts. Figure 3 shows the second
FIG. 3 is an enlarged cross-sectional view taken from the direction of line 3-3 in the figure. FIG. 4 is an enlarged cross-sectional view similar to FIG. 3 showing selective backset adjustment positions of the bolt casing and bolt assembly. Figure 5 shows the third stage before starting the backset adjustment.
It is an enlarged cross-sectional view similar to the figure, 5-5 in Figure 2.
This is the view from the direction of the line. FIG. 6 is an enlarged cross-sectional view similar to FIG. 5 showing the bolt assembly rotated to the backset adjustment position. FIG. 7 is a longitudinal sectional view similar to FIG. 2, but with the bolt casing and some parts of the bolt assembly moved longitudinally forward during backset adjustment.
FIG. 8 is a longitudinal cross-sectional view similar to FIG. 7, but with the bolt casing and some parts of the bolt assembly finally partially rotated laterally so that the latch structure reaches its maximum backset adjustment position. This indicates the state occupied. FIG. 9 is an exploded view showing various parts of the latch structure of the present invention. 10...door, 20...vertical end surface of door, 22
... Latch operating device, 24 ... Bolt assembly, 4
6...First spindle (horizontal axis line), 58...Second
Spindle (horizontal axis), 72...inner bolt carriage, 98...U-shaped protuberance.

Claims (1)

[Claims for Utility Model Registration] Within the bolt casing 26 attached to the door 10, there are two positions: a position extending forward from the vertical end face 20 of the door 10 and a position completely retracted rearward into the vertical end face 20. a bolt assembly 24 that is longitudinally reciprocatable therebetween; a forward portion operatively connected to said bolt assembly 24 and a rearward portion connected to the outer and inner operating assemblies 28, 30 of the door 10; a latch drive mechanism 32 operatively connected thereto, the operating assemblies 28 , 30 having respective first spindles 46 and 30 for actuating the latch drive mechanism 32 to reciprocate the bolt assembly 24 . rotatable about the second spindle 58, of the type having selectively adjustable backset dimensions;
In latch structures installed in doors and the like, the bolt casing 26 consists of an outer casing part 84 and an inner casing part 86 fitted within the outer casing part 84; The casing part 84 is formed with a rear backset positioning slot 94 and a front backset positioning slot 96.
A protrusion 100 is formed on the inner casing part 86, and the protrusion 100 is formed on the outer casing part 8.
4, the bolt assembly 24 selectively engages a rear backset locating slot 94 and a front backset locating slot 96 of the outer bolt 70;
an inner bolt carriage 72 that is slidably fitted within the outer bolt 70, and the inner bolt carriage 72 is connected to the outer casing part 84.
and a rear positioning slot 8
0 and a forward locating slot 82, and the outer bolt 70 is formed with a protrusion 76 that is connected to the inner bolt carriage 72.
A latch structure for installation in doors and the like, characterized in that it is configured to selectively engage said rear locating slot 80 and said front locating slot 82 of a latch structure.